CN100428706C - Radio communication apparatus - Google Patents
Radio communication apparatus Download PDFInfo
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- CN100428706C CN100428706C CNB011249056A CN01124905A CN100428706C CN 100428706 C CN100428706 C CN 100428706C CN B011249056 A CNB011249056 A CN B011249056A CN 01124905 A CN01124905 A CN 01124905A CN 100428706 C CN100428706 C CN 100428706C
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- mac controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
- H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
- H04B1/0071—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands using a common intermediate frequency for more than one band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/12—Frequency diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Abstract
Radio communication apparatus includes a baseband processor for modulating data to be transmitted into an IF signal and for demodulating an IF signal derived from a received high frequency signal. A front end section receives the IF signal from the baseband processor and converts that IF signal into a high frequency signal for transmission. The front end section also is adapted to receive a high frequency signal from a remote location, and converts the received high frequency signal into an IF signal that is supplied to the baseband processor for demodulation and data recovery. The front end section is operable in a plurality of frequency bands and is tunable to a frequency within a selected one of the frequency bands for use as a radio frequency channel. Consequently, the number of simultaneously assigned channels in the same area can be markedly increased and the possibility of interrupting a communication link is significantly reduced.
Description
Technical field
The present invention relates in WLAN (local area network (LAN)), have the Wireless Telecom Equipment of special practicality, especially the Wireless Telecom Equipment that can in having the environment that disturbs and interfere, operate.
Background technology
Proposed Wireless LAN system is used for communicating by letter between the various piece of the equipment in a limited range, this limited range can be a building, a dwelling house, a house or a room.For this reason, IEEE (Institute of Electrical and Electric Engineers) 802.11 standard codes the 2.4GHz frequency band as can be used for a radio frequency band of such Wireless LAN system.
Summary of the invention
Fig. 1 has represented the Wireless LAN system of a 2.4GHz frequency band, and wherein the data that will transmit are converted into packet, transmit by MAC controller (MAC) 91, and the bag that the MAC assembling is used to send, and the bag that will receive decomposes.Baseband processor (BBP) 92 is modulated into packet intermediate frequency (IF) signal of the hundreds of MHz order of magnitude on the high-transmission digit rate, the packet that this processor modulation is used to send, and when data are received, the demodulation intermediate-freuqncy signal.Front end part 93 converts intermediate-freuqncy signal the high-frequency signal of selected radio frequency in the 2.4GHz frequency band to, and this high-frequency signal sends from antenna 99.
In the Data Receiving of Wireless Telecom Equipment, the high-frequency signal that sends from another Wireless Telecom Equipment is received by antenna 99, and is converted into intermediate-freuqncy signal by front end part 93.Baseband processor 92 demodulation intermediate-freuqncy signals recover the data of packetized form, and these packets that recovered are decomposed by MAC controller.
In Wireless LAN system, the transmission range of data between the different piece of equipment approximately is sighting distance 100m.Therefore, if each institute's dwelling house or each room structure Wireless LAN system for the building that is arranged in a zone, and in this zone, population is that room intensive or wherein is located adjacent one another, because radio wave can pass the body of wall that does not comprise metal very easily, so several Wireless LAN system that interferes with each other can appear at a zone simultaneously.
The IEEE802.11 standard code 11 channels (from channel 1 to channel 11), be distributed in from 2.400 to 2.483GHz 2.4GHz frequency band, each channel is configured to 5MHz frequency at interval.In order to hold a plurality of channels simultaneously in identical scope, the frequency interval between the adjacent channel that can use in that scope should be equal to or greater than 25MHz, as described in summary among Fig. 2.Like this, because high-frequency signal has a fixed-bandwidth of having modulated, if the frequency of adjacent channel is closer to each other, such as being spaced apart 5MHz, the signal of a channel is as the interference wireless wave of one other channel signal.Therefore, be distributed in the 2.4GHz frequency band, the quantity maximum of simultaneously applied channel should be limited in 3 in identical scope, resembles among Fig. 2 shown in the channel 1,6 and 11.As a result, if Wireless LAN system is applied to each building or each dwelling house or room in a densely populated zone, then may there be enough available channel.
The IEEE802.11 standard is permitted a communication protocol, with when guaranteeing to share the free time of same channel, communicates to connect; Though transmission rate may be lowered.Yet, do not meet the wireless wave of IEEE802.11 standard or may disturb the air interference of communicating by letter in the Wireless LAN system, may in the operating area of Wireless LAN system and 2.4GHz frequency band, occur, such as, the wireless wave communication of wireless wave that from microwave oven, leaks or digital cordless phones.As a result, view data or voice data can not be transmitted by Wireless LAN system in such interference wireless wave environment in real time satisfactorily.
Recently, the IEEE802.11 standard has been proposed the 5GHz frequency band as the frequency band that is used for Wireless LAN system.Therefore, can replace the communication band of 2.4GHz with the 5GHz frequency band as Wireless LAN system.Yet, just as situation about appearing in the 2.4GHz frequency band, identical shortcoming and difficulty also may appear at the 5GHz frequency band, therefore, a plurality of channels are used for identical when regional, especially in densely populated zone, the frequency interval of nearby frequency bands should be equal to or greater than 40MHz in the 5GHz frequency band.Therefore, the channel quantity that is used for the interference that does not cause interchannel in the identical zone of 5GHz frequency band simultaneously should be limited in 4, as among Fig. 3 as can be known.Here also be, if outside interference or interference, such as from microwave leakage or digital cordless phones, and if Wireless LAN system be used for each institute's dwelling house or each room in each building or densely populated zone, then can not obtain the channel of sufficient amount.
The invention provides a kind of radio communication device, be highly suitable for a Wireless LAN system, it has increased the quantity of the channel that can distribute simultaneously in same area, and has reduced that communicate to connect may be disturbed or interfere the possibility that interrupts.
Radio communication device of the present invention is very suitable for combining with existing popular Wireless Telecom Equipment and forms the single band Wireless LAN system.
Radio communication device of the present invention preferably includes a baseband processor, is used for the data-modulated that will send is become the IF signal, and the IF signal that obtains from the high-frequency signal that receives is carried out demodulation.Front end partly receives the IF signal from baseband processor, and becomes high-frequency signal to transmit this IF signal transition.The front end part also is suitable for receiving from high-frequency signal at a distance, and converts the high-frequency signal that receives to the IF signal, and this IF signal is provided for baseband processor and is used to separate the recovery of mediation data.The front end part is spendable in a plurality of frequency band, and may be tuned to certain frequency, and this frequency is arranged in a frequency band of selecting as the frequency band of radio-frequency channel.Therefore, the quantity of the channel that distributes simultaneously in identical scope can significantly improve, and the possibility that communication link is interrupted has reduced significantly.
Front end part can comprise a plurality of front end circuit, and each is in the respective frequencies frequency band all.In other words, the front end part can comprise a front end circuit, and it is public to each frequency band.
As one aspect of the present invention, frequency transitions selector selects a frequency channels in the frequency band and the selected frequency band to be used for least interference communication.
According to another aspect of the present invention, Base-Band Processing part can be used any in numerous modulation schemes or the form and come the modulation data.Therefore, can select and change frequency band, frequency channels and modulation format improve communicates by letter and improves reliability.
Best, frequency band comprises 2.4GHz and 5GHz frequency band; The modulation form comprises CCK and OFDM, typically, when control section is selected the 2.4GHz frequency band, uses the CCK form; When selecting 5GHz, use the OFDM form.
The invention provides a kind of device of communicating by radio of being used for, comprising: (a) MAC controller, the transmission data set that is used for being sent out is dressed up packet; (b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (c) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal; (d) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives; (e) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal; (f) this front end partly sends this high-frequency signal; (g) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal; (h) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor; (i) described MAC controller partly provides suitable control signal for described front end; (j) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (k) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection.
The invention provides radio communication device, comprising: (a) wireless communication section comprises: (i) MAC controller, and the transmission data set that is used for being sent out is dressed up packet; (ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (iii) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal; (iv) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives; (v) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal; (vi) this front end partly sends this high-frequency signal; (vii) this front end partly receives the high-frequency signal from far-end, and converts the high-frequency signal that receives to intermediate-freuqncy signal; (viii) this front end partly provides the intermediate-freuqncy signal that has transformed to described baseband processor; (ix) described MAC controller partly provides suitable control signal for described front end; (x) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (xi) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; (b) control section is used for selecting a frequency band and at the frequency channels of selected frequency band, avoids otherwise will weaken the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
The invention provides a kind of device of communicating by radio of being used for, comprising: (a) MAC controller, the transmission data set that is used for being sent out is dressed up packet; (b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (c) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal; (d) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives; (e) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal; (f) this front end partly sends this high-frequency signal; (g) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal; (h) this front end part, the intermediate-freuqncy signal that conversion is provided is to described baseband processor; (i) described MAC controller partly provides suitable control signal for described front end; (j) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (k) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; (l) intermediate-freuqncy signal has by the shared IF-FRE of a plurality of frequency band.
The invention provides radio communication device, comprising: (a) wireless communication section comprises: (i) MAC controller, and the transmission data set that is used for being sent out is dressed up packet; (ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (iii) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal; (iv) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives; (v) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal; (vi) this front end partly sends this high-frequency signal; (vii) this front end partly receives the high-frequency signal from far-end, and converts the high-frequency signal that receives to intermediate-freuqncy signal; (viii) this front end partly provides the intermediate-freuqncy signal that has transformed to described baseband processor; (ix) described MAC controller partly provides suitable control signal for described front end; (x) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (xi) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; (xii) intermediate-freuqncy signal has by the shared IF-FRE of a plurality of frequency band; (b) control section is used for selecting a frequency band and at the frequency channels of selected frequency band, avoids otherwise will weaken the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
The invention provides a kind of device of communicating by radio of being used for, comprising: (a) MAC controller, the transmission data set that is used for being sent out is dressed up packet; (b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (c) baseband processor can be used for receiving packet from described MAC controller according to different modulating/demodulating format operations, and the packet that receives is modulated into intermediate-freuqncy signal and will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives; (d) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is changed into high-frequency signal; (e) this front end partly sends this high-frequency signal; (f) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal; (g) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor; (h) described MAC controller partly provides suitable control signal for described baseband processor and described front end; (i) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (j) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; And (k) form selector, the control signal that provides according to from described MAC controller is provided, the signal of having selected one of described different modulating/demodulating form to provide to improve sends and receives.
The invention provides Wireless Telecom Equipment, comprising: (a) wireless communication section comprises: (i) MAC controller, and the transmission data set that is used for being sent out is dressed up packet; (ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation; (iii) baseband processor, can be according to different modulating/demodulating format operations, be used for receiving packet, the packet that receives is modulated into intermediate-freuqncy signal and will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives from described MAC controller; (iv) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is changed into high-frequency signal; (v) this front end partly sends this high-frequency signal; (vi) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal; (vii) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor; (viii) described MAC controller partly provides suitable control signal for described baseband processor and described front end; (ix) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller; (x) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; (xi) form selector is used for according to the control signal that provides from described MAC controller, and the signal of having selected one of described different modulating/demodulating form to provide to improve sends and receives; And (b) control section, the signal that has been used to select one of described different modulating/demodulating form to provide to improve sends and receives, and the modulation format control signal is offered the described MAC controller of described wireless communication section, this control section is selected a frequency band and the frequency channels in selected frequency band, avoid otherwise will weaken the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
Description of drawings
Reference diagram from the following description, will be further understood that the present invention, is not limited only to the present invention though the present invention illustrates by way of example:
Fig. 1 is the block diagram of an example of radio communication device.
Fig. 2 is the diagrammatic view of the channel configuration of explanation 2.4GHz frequency band.
Fig. 3 is the similar view of the channel configuration of explanation 5GHz frequency band.
Fig. 4 is a block diagram of forming an example of Wireless LAN system of the present invention.
Fig. 5 is the block diagram of an example of explanation base terminal (base terminal).
Fig. 6 is the block diagram of an example of explanation portable terminal.
Fig. 7 is the block diagram according to the radio communication device of the first embodiment of the present invention.
Fig. 8 is the block diagram according to the radio communication device of another embodiment of the present invention.
Fig. 9 is according to the block diagram of the radio communication device of an embodiment more of the present invention.
Figure 10 is the block diagram according to the radio communication device of an additional embodiment of the present invention.
Figure 11 is the block diagram according to the radio communication device of another one embodiment of the present invention.
Figure 12 is the block diagram according to the radio communication device of further embodiment of the present invention.
Figure 13 is the block diagram according to the radio communication device of an alternative embodiment of the invention.
Figure 14 is the block diagram according to the radio communication device of further embodiment of the present invention.
Figure 15 be according to another embodiment of the present invention the block diagram of radio communication device.
Figure 16 is the block diagram according to the radio communication device of further embodiment of the present invention.
Figure 17 be according to another one embodiment of the present invention the block diagram of radio communication device.
Figure 18 be according to further embodiment of the present invention the block diagram of radio communication device.
Figure 19 be according to further embodiment of the present invention the block diagram of radio communication device.
Figure 20 is the block diagram of the detailed construction of the front end part shown in expression Figure 19.
Figure 21 A-21C is the block diagram that shows the single band Wireless LAN system of using different frequency frequency band and different modulating form;
Figure 22 is the flow chart that shows the example that can be used for frequency band of the present invention and modulation format conversion procedures.
Embodiment
With reference to figure 4, it has represented to form an example of the Wireless LAN system of Wireless Telecom Equipment of the present invention.Illustrated system comprises 10 and portable terminal devices 40 of a base terminal (or base unit).Base terminal 10 is connected to external equipment by telephone line 1, permits telephone communication with it.The example of these external equipments comprises the internet, database, and remote terminal, or the like, each in them all is adapted to pass through telephone wire and communicates by letter with base unit.Base unit 10 also is connected to a plurality of exterior terminals, such as, set-top box (STB) 3, digital video disk player (DVD) 4, digital audio tape recorder, as digital tape recorder (D-VTR) 5, or the like.By being these connections of hard wire, infrared ray connection or wireless connections, audio frequency and/or video information can be by these external device communications to base units 10, and similarly, audio frequency and/or video information and operation control data also can be from base unit these external equipments of communicating by letter.
Turn to Fig. 5, will be described in detail base terminal 10, it comprises wireless communication section 70 and control unit 20.Control unit is made up of bus 22, and information is being transmitted on bus 22 under the control of CPU (CPU).ROM23 is connected to bus 22 and stores the software program that CPU21 carries out therein.RAM24 also is connected to bus, and comes to provide common working region for operation CPU as a temporary transient memory device especially.
Modulator-demodulator 31 is connected to bus 22, and provides common interface between control unit 20 and telephone wire 1.In addition, shown in schematic diagram, set-top box 3, digital video disk player 4, tape recorder 5 and other external equipment (not illustrating) by interface (I/F) circuit 33,34 and 35, are connected on the bus 22 respectively.These I/F circuit provide interface for audio frequency and/or video information, these information are provided for base terminal 10 and are used for being delivered to portable terminal device 40 by wireless communication section 70 (will introduce), and allow control data from base terminal to be delivered to be used to control the external equipment of its independent operation, such as, channel is selected, reset, stop, or the like.Operation part 17 also is connected to bus 22 by interface circuit 37.
Similar, the high-frequency signal that sends from portable terminal device 40 receives by antenna 79, obtains an IF signal that comprises the packet of having modulated by front end part down conversion (down-converte).The IF frequency of the IF signal that obtains may with up conversion and to send to the IF frequency of IF signal of portable terminal device identical.Obtain, or the IF signal that recovers separates by baseband processor 72 and transfer to recover the packet that provided, and decompose by MAC controller 71.
Therefore, be appreciated that these data, such as A/V information, order data, or the like be combined into packet, be modulated into the IF frequency, up conversion becomes high-frequency radio frequency, and sends to portable terminal device 40 from front end part 73.Equally, 10 data of returning that comprise information and order data from the portable terminal device to the base terminal, on firing frequency, be received by antenna 79, be downconverted into the IF signal by front end part 73, by baseband processor 72 demodulation, unpack by MAC controller 71, offer external equipment or the external network that is connected to base terminal 10 by I/O port 25.
Fig. 6 is a schematic block diagram that shows portable terminal device 40, and can find out and comprise wireless communication section 70, similar in appearance to the top part of discussing in conjunction with Fig. 5 70; Also has control unit 50, similar in appearance to control unit 20.For the purpose of brief, the wireless communication section 70 among Fig. 6 just has not been described in further detail.
Control unit 50, the same with control unit 20, comprise CPU51 (similar in appearance to CPU21), ROM53 (similar in appearance to ROM23), RAM54 (similar in appearance to RAM24), I/F circuit 56 (similar in appearance to I/F circuit 26) and I/O port 55 (similar in appearance to I/O port 25).As seen the CPU among Fig. 6, ROM, RAM, I/F circuit and I/O port are connected on the bus 52 similar to foregoing bus 22.
At last, the operation part 47 similar in appearance to foregoing operation part 17 is connected to bus 52 by interface circuit 67.
As the situation among Fig. 5, comprise that the data of A/V information and order data not only can be transferred to bus 52 but also can receive from bus 52 by wireless communication section 70.These data that are provided for bus from, for example, microphone 45 and operation part 47; And data can be received from bus 52, are used for showing by LCD unit 41 and loud speaker 43.
As situation about discussing among Fig. 5, the I/F circuit 56 among Fig. 6 is selected modulation format, and transmission/reception control signal for wireless communication section 70 provides frequency band.These control signals are similar with the control signal that offers wireless communication section by I/F circuit 26, thus portable terminal device can with the base terminal same frequency band in same frequency operate with identical modulation format.
Now will be in conjunction with the various embodiment of the block diagram shown in Fig. 7-20 to wireless communication section 70, and the member that is included in the wireless communication section is introduced.Because identical wireless communication section not only is used in base terminal but also be used in portable terminal device, this description is applicable to two types terminal.
Forward Fig. 7 now to, will illustrate in greater detail an embodiment of front end part 73.The same as described, front end partly is connected on the baseband processor 72, this processor MAC controller 71 that is linked in sequence, as illustrated in Figures 5 and 6.Here front end part 73 is illustrated and is described as, and comprises separating the front end circuit: a front end circuit 80 adjustable in the 2.4GHz frequency band and a front end circuit 80b adjustable in the 5GHz frequency band.A frequency band selector switch 75 of being selected signal S10 to control by frequency band is connected to antenna 79 with 2.4GHz front end circuit 80a or 5GHz front end circuit 80b, is used at 2.4GHz or 5GHz frequency band transmission/received RF signal.In this embodiment, still be that the 5GHz frequency band is used for communication according to selecting the 2.4GHz frequency band, the packet that produces modulation is as the IF signal of showing different I F frequency.For example, baseband processor 72 produces the IF signal with frequency f ia, and this frequency offers front end circuit 80a by band pass filter 74a, and similar, baseband processor produces the IF signal of IF frequency f ib, and this frequency offers front end circuit 80b by band pass filter 74b.As an example, fia＞fib.Be appreciated that when each front end circuit operation to receive and during the down conversion radiofrequency signal, front end circuit 80a produces the IF signal of IF frequency f ia that front end circuit 80b produces the IF signal of IF frequency f ib.
Though not expression is appreciated that the various filter circuit that provides can make interfering frequency minimize or prevent the spuious transmission of interfering frequency in each front end circuit in Fig. 7.Simultaneously, though each frequency mixer roughly is described as an independent circuit, persons of ordinary skill in the art may appreciate that each frequency mixer can constitute a multistage frequency mixer, this frequency mixer becomes upper frequency with the IF frequency up-converted, and upper frequency is downconverted into the IF frequency.
In operation, the user of Wireless Telecom Equipment at first selects to provide the frequency band of optimal communication, frequency channels in the frequency band and modulation format.For example, base terminal 10 and/or portable terminal device 40 can comprise that appropriate signal is measured and display device just indicates intensity at received signal for the user.In the signal strength signal intensity that observation is selected each time, the user can be with the different frequency channels of voltage controlled oscillator tuning in the different frequency frequency band.The frequency of performance maximum signal can be selected as frequency channels fa or fb.In one embodiment, when the frequency channels of selecting is in the 2.4GHz frequency band, use the CCK form, when the frequency channels of selecting is in the 5GHz frequency band, use the OFDM form.In other words, do not consider the particular frequencies frequency band selected, the user not only can select the CCK form but also can select the OFDM form, and this depends on which kind of form provides higher signal strength signal intensity.Therefore, if there is external disturbance in connection to radio communication, perhaps, for example, if owing to microwave radiation leakage produces interference, the user still can select a particular frequencies channel in the particular frequencies frequency band with particular modulation form, and the result reaches optimum communication.In addition, even after a desired frequency channel is selected, if communicate by letter existing on the channel that disturbs or interfere, the user can select a different frequency frequency band by operational frequency bands selector switch 75, so that this interference or interference are minimized; In other words, the user also can communicate by letter to different frequency channels voltage controlled oscillator tuning to improve.The desired frequency frequency band, the selection of frequency channels and modulation format can be realized by operation part 17 or operation part 47, be presented at respectively among Fig. 5 and Fig. 6.
In other words, can control the desired frequency channel automatically, the selection of frequency band and modulation format.For example, before carrying out data communication between basis and the portable terminal device, the tuning of voltage controlled oscillator can be moved a channel of a channel, move then that (for instance, the frequency band selector switch can change, for example a frequency band of another frequency band, from 2.4GHz to 5GHz), during the signal strength signal intensity of the radio frequency that receives when measurement, CPU21 or CPU51 can temporarily store the signal strength signal intensity of each frequency that voltage controlled oscillator tuning arrives, and the channel frequency of signal strength signal intensity maximum is selected.In other words, be not to measure the signal strength signal intensity receive, but the bit error rate of received signal can be determined, cause the channel frequency of the minimum bit error rate selected.This also is, if for the external disturbance or the interference of communication link, such as, microwave radiation leakage, cause reducing or the increase of bit error rate of signal strength signal intensity, it is selected that another support has the frequency channels of high-frequency wireless communication of higher signal strength and/or low bit error rate.
Be appreciated that by application the present invention, embodiment as shown in Figure 7, the quantity that is allocated for the high frequency channel of a given area has significantly increased.Especially, the example of the application channel frequency shown in Fig. 2 and 3 can distribute 7 possible channels, heretofore, has only 3 channels (in the 2.4GHz frequency band) or has only 4 channels (in the 5GHz frequency band) can be used to distribute.
An alternative embodiment of the invention is shown in the figure among Fig. 8.Here, an independent front end circuit 80 not only can be in 2.4GHz frequency band adjustments but also can be in the 5GHz frequency band adjustments, otherwise, in the embodiment shown in Fig. 7, use two to separate the front end circuit and be employed.Voltage controlled oscillator 81 therefore can be tuned to different frequency in 2.4GHz frequency band and the 5GHz frequency band.In this embodiment, baseband processor 72 produces the IF signals, and its IF frequency f i frequency that is used for up conversion in 2.4GHz frequency band and the 5GHz frequency band that coexists is identical.Therefore, public band pass filter 74 is used for above-mentioned two frequency bands.
Shown in the embodiment in Fig. 8, if it is very difficult or very expensive to constitute a voltage controlled oscillator that may be tuned to different frequency in 2.4GHz frequency band and the 5GHz frequency band, can come the frequency (approximately 5GHz) of decomposition pressure controlled oscillator with a frequency divider, for example, coefficient 2, therefore identical voltage controlled oscillator still can be used for producing frequency channels at two frequency bands.
Though in Fig. 8, do not express, be appreciated that voltage controlled oscillator 81 be tuned to a frequency channels in 2.4GHz frequency band or 5GHz select control signal S10 Be Controlled by frequency band at least in part.
Fig. 9 is the block diagram of another embodiment of the present invention.As can be seen, except the antenna of the separation that offers the different frequency frequency band, Fig. 9 is similar in appearance to Fig. 7.Use community antenna 79 different in 2.4GHz frequency band and 5GHz frequency band with the embodiment shown in Fig. 7, the embodiment shown in Fig. 9 uses antenna 79a and the 79b that separates respectively.
Figure 10 shows a further embodiment of the present invention, seems quite similar with the embodiment shown in Fig. 8.Different among embodiment among Fig. 9 and Fig. 8 are the antenna 79a and the 79b that separate, and they provide at the different frequency frequency band.Therefore, as shown in Figure 10, can be the output of the front end circuit 80 of the frequency channels in 2.4GHz frequency band or the 5GHz frequency band, offer among antenna 79a and the 79b one by selector switch 76, this switch is selected control signal S10 control by frequency band.For example, if communication occurs in the 2.4GHz frequency band, switch 76 is connected to front end circuit 80 with antenna 79a.Similarly, if communication is created in the 5GHz frequency band, switch 76 is connected to the front end circuit with antenna 79b.
Figure 11 is a block diagram that shows a further embodiment of the present invention, the wherein selected application of the 3rd frequency band possibility, rather than 2.4GHz frequency band and 5GHz frequency band.As an example, the 3rd frequency band may be the frequency that a frequency is higher than 5GHz.Here, front end part 73 is similar in appearance to shown in Fig. 7, but it provides by the 3rd front end circuit 80c, and this circuit is connected to baseband processor 72 by band pass filter 74c.Band pass filter 74c is suitable for allowing the IF frequency that is different from foregoing IF frequency f ia and fib pass through.
The switch 75a and the better way of 75b of separation are provided as selectable ratio, 3 independent phase selector switches can be used for connecting selectively antenna 79 to front end circuit 80a or arrive front end circuit 80b, perhaps arrive front end circuit 80c, this depends on the frequency band selection control signal that is provided on it.
Figure 12 has described one for the alternate embodiments shown in Figure 11.Here, provide an independent front end circuit 80, this front end circuit can be adjusted to the different frequency channels in each of three frequency band.The advantage of embodiment shown in Figure 12 is that single, public IF frequency f i can be applied to up conversion (or down conversion) each to three frequency bands.When using a public IF frequency, band pass filter 74 equally can simplified structure.Be appreciated that closely similar shown in the embodiment shown in Figure 12 and Figure 18, except being suitable for being tuned to the front end circuit 80 of the expected frequency channel of three wireless communication frequency frequency bands in each.
For 3 frequency band front ends another kind of selectable way partly as shown in Figure 13.Figure 13 is different from the embodiment shown in Figure 11, the antenna 79a of 3 separation wherein, and 79b and 79c are respectively applied in 2.4GHz frequency band and 5GHz frequency band and the 3rd frequency band and communicate.In this, the embodiment shown in the embodiment shown in Figure 13 and Fig. 9 is closely similar, except the front end part 73 shown in Fig. 9, is connected to antenna 79c by the 3rd front end circuit 80c now and has gone up.
The further selectable method of 3 frequency band embodiment is represented in Figure 14.2 frequency band embodiment shown in this embodiment and Figure 10 are closely similar, except offering the third antenna 79c of the 3rd frequency band.In order to realize this embodiment, the switch 76 among Figure 10 can be made of the switch 76a and the 76b of two separation, as shown in Figure 14.In other words, the switch 76 of Figure 10 can constitute 3 phase switches.
Figure 15 has represented a kind of improvement that embodiment did shown in Fig. 9.In Fig. 9 embodiment, collaborative respectively 2.4GHz frequency band of different IF frequency f ia and fib and 5GHz band applications.In other words, baseband processor 72 modulates data on IF frequency f ia, and this frequency is used for up conversion by 2.4GHz front end circuit 80a up conversion and packet is modulated into IF frequency f ib by 5GHz front end circuit 80b.In Figure 15, public IF frequency f i produces by baseband processor 72, and the IF frequency that this is public is selected at frequency band under the control of control signal S10, is provided to front end circuit 80a or to front end circuit 80b by frequency band selector switch 77.
Similarly, Figure 16 is the alternate embodiments of the embodiment shown in Fig. 7, uses the public IF frequency f i that is produced by baseband processor 72.In Figure 16, public IF frequency by frequency band selector switch 77, is provided to front end circuit 80a or front end circuit 80b by band pass filter 74.Therefore, which frequency band to be selected for communication according to, switch 75 and 77 is set up communication path by front end circuit 80a or 80b between antenna 79 and band pass filter 72.
Figure 17 has illustrated the improvement of embodiment shown in Figure 13.Use to separate IF frequency f ia among the embodiment of Figure 13, fib and fic, and among Figure 17 with a public IF frequency f i.This public IF frequency is selected at frequency band under the control of control signal S11 and S12, by frequency band selector switch 77a with 77b is provided for or from front end circuit 80a, 80b and 80c.
Similarly, Figure 18 shows the improvement of embodiment shown in Figure 11, and Figure 18 embodiment uses a public IF frequency f i, and Figure 11 embodiment is for front end circuit 80a, and 80b uses the IF frequency of separating respectively with 80c.Selected according to which frequency band, switch 75a, 75b is connected to suitable front end circuit with antenna 79; Switch 77a and 77b are connected to the front end circuit on the baseband processor 72 by band pass filter 74.
When this embodiment that further is described has proposed to use two or three different frequency frequency bands, be appreciated that the number of frequency band is unrestricted in theory.For utilizing the present invention, the physical constraints of frequency band quantity is the cost that has constituted the front end circuit and distributed available frequencies and bandwidth.
Figure 19 shows a further alternative embodiment of the present invention.Figure 19 is similar in appearance to the embodiment shown in Fig. 7, and except the embodiment of Figure 19 uses a public IF frequency, this frequency offers and produced by front end circuit 80a and 80b.In addition, be illustrated in baseband processor 72a and 72b that baseband processor 72 among Figure 19 comprises separation, they are suitable for respectively according to CCK and OFDM format operation.Switch 72p and 72q under the control of modulation format control signal S30, by CCK baseband processor 72a or OFDM baseband processor 72b, are connected to MAC controller 71 with front end part 73.Typically, if frequency band selects control signal S10 to select the 2.4GHz frequency band to be used for communication, then modulation format control signal S30 selects the CCK baseband processor.In other words, equally typically, if frequency band selects control signal to select the 5GHz frequency band to be used for communication, then the modulation format signal is selected the OFDM baseband processor.Be appreciated that the selection of frequency band and modulation format to be chosen on base terminal and the portable terminal device all be identical.In these terminals one or another can be thought a master terminal, and it sends suitable master control to the slave terminal and selects signal.
Figure 20 has described the front end part 73 shown in Figure 19 in further detail.The front end part 73 that is appreciated that Figure 20 is similar in appearance to the front end part shown in Fig. 7, except Figure 20 uses a public IF signal with IF frequency f i.Switch 77 is selected at frequency band under the control of control signal S10, and is selected according to which frequency band, will be connected to front end circuit 80a or front end circuit 80b from the IF signal of band pass filter 74.Similarly, when receiving high-frequency wireless signals, switch 77 will be connected to band pass filter from front end circuit 80a or from the IF signal of front end circuit 80b.
Figure 21 A-21C shows application different frequency frequency band and the front end circuit of different modulating form and the Typical Disposition of baseband processor.For example, the wireless communication section 90A shown in Figure 21 A shows the application of CCK modulating mode when communication in the 2.4GHz frequency band.
Similarly, the front end part 90B shown in Figure 21 B shows the application of OFDM form when transmission in the 5GHz frequency band.The application of the baseband processor that the front end part 70D explanation shown in Figure 21 C can be operated in CCK and OFDM form respectively, this can select individually, depends on which frequency band is selected.Therefore wireless communication section 70D can be the form shown in Figure 19.In other words, can be used as the baseband processor of wireless communication section 70D with the baseband processor of two kinds of format operations.
With reference to Figure 22, be the flow chart of describing operation, for example, the CPU21 or the CPU51 of operation response part 17 or operation part 47 select frequency band and/or modulation format to realize having the optimal communication of least interference and interference.Therefore by the program shown in the flow chart of Figure 22,, select a frequency channels in the frequency band to send and be received in data between base terminal 10 and the portable terminal device 40 as the interference function of the frequency channels that may appear at initial selection.Similarly, carry out this routine change modulation format so that make harmonious or transmitting and receive data of having improved be provided with selected frequency band.Suppose that CCK form or OFDM form may be used to the modulating/demodulating data, and do not consider to select to be used for the frequency band of radio communication.
In the program shown in Figure 22, instruction S1 at first will partly be converted to the 2.4GHz frequency band at the front end in the wireless communication section of base terminal and portable terminal device.For example, at the embodiment shown in Fig. 7,80a is selected for the front end part.Program proceeds to inquiry S2 then and decides whether the acceptable received of radio communication is possible.The error rate rate of the signal strength signal intensity of the signal that for example, receives or this signal is measured.If answer is yes for inquiry S2, program advances to instruction S3, and this instruction changes the basis and makes the baseband processor of taking in the terminal so that at the CCK format operation.Then, program advances to inquiry S4, judges whether acceptable demodulation has occurred.For example, data are transmitted on the frequency channels in the 2.4GHz frequency band now, and by demodulation, and the error rate of demodulating data is detected with the modulation of CCK form.If the error rate can be accepted, inquiry S4 answers of answering affirmatively, program advances to instruction S5, here, communicates by letter and carries out at 2.4GHz band applications CCK form.
Yet if inquiry S2 obtains negative acknowledge, program is advanced so that change frequency band to the 5GHz frequency band, and the S7 that executes instruction then makes modulation format into OFDM.Then, carry out inquiry S8 decide with the modulation of OFDM form data could be by successful demodulation.If answer is yes in inquiry, program advances to instruction S5, and communication remains on the 5GHz frequency band according to the OFDM form.But if the answer is in the negative for inquiry S8, program advances to instruction S9, and this instruction changes to CCK with modulation format from OFDM.Communication keeps according to the CCK form at the 5GHz frequency band now.
If inquiry S4 has been done negative acknowledge, in other words, if do not obtain acceptable demodulation (but the signal strength signal intensity of the frequency channels in the 2.4GHz frequency band is acceptable) at the 2.4GHz frequency band according to the communication of CCK form, execution command S6 comes to change modulation format from CCK to OFDM.Therefore, communication keeps according to the OFDM form at the 2.4GHz frequency band.
When the present invention is specifically described with reference to several preferred embodiments, persons of ordinary skill in the art may appreciate that not deviating from the spirit and scope of the present invention can carry out various changes and improvements.For example, but base terminal 10 can comprise the tuner that a receiving digital broadcast sends, such as, Digital Television sends.By wireless communication section 70, the information that is included in those transmissions can be resumed, and is combined into packet, modulation and up conversion.According to the present invention, the base terminal communication that has portable terminal device is by regulating the front end part, this part is arranged in the wireless communication section with two terminals, selects frequency channels in the frequency band of selected application particular modulation form, so that the influence of external disturbance and interference is minimized.In other words, selecteed particular frequencies channel and/or modulation format can be considered to appear at the interference function in the environment.
A result of the present invention, when the communication link between basis and the portable terminal device because during the minimizing possibility that the result of external disturbance is interrupted, the quantity of the assignable channel in given scope can significantly increase.Further, wireless communication section of the present invention will be constituted effectively at an easy rate.
Claims (19)
1. one kind is used for the device that communicates by radio, comprising:
(a) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(c) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal;
(d) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives;
(e) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal;
(f) this front end partly sends this high-frequency signal;
(g) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal;
(h) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor;
(i) described MAC controller partly provides suitable control signal for described front end;
(j) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller;
(k) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection.
2. the device described in claim 1, wherein said front end partly comprises a plurality of front end circuit, each front end circuit is adjustable in frequency band separately.
3. the device described in claim 1, wherein said front end partly comprises the front end circuit that a plurality of frequency band are shared.
4. the device described in claim 1 further comprises a plurality of antennas, and each antenna transmission also is received in high-frequency signal in the frequency band separately.
5. the device described in claim 1 further comprises a community antenna, is used for sending and being received in the high-frequency signal of all frequency band.
6. the device described in claim 1, wherein frequency band comprises a 2.4GHz frequency band and a 5GHz frequency band.
7. radio communication device comprises:
(a) wireless communication section comprises:
(i) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(iii) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal;
(iv) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives;
(v) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal;
(vi) this front end partly sends this high-frequency signal;
(vii) this front end partly receives the high-frequency signal from far-end, and converts the high-frequency signal that receives to intermediate-freuqncy signal;
(viii) this front end partly provides the intermediate-freuqncy signal that has transformed to described baseband processor;
(ix) described MAC controller partly provides suitable control signal for described front end;
(x) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller;
(xi) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; With
(b) control section is used for selecting a frequency band and at the frequency channels of selected frequency band, avoids weakening the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
8. one kind is used for the device that communicates by radio, comprising:
(a) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(c) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal;
(d) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives;
(e) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal;
(f) this front end partly sends this high-frequency signal;
(g) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal;
(h) this front end part, the intermediate-freuqncy signal that conversion is provided is to described baseband processor;
(i) described MAC controller partly provides suitable control signal for described front end;
(j) described front end part can be transferred to selected a plurality of frequency band one the different frequency channel in each frequency channels, a plurality of frequency band as a radio frequency according to the control signal that provides from described MAC controller;
(k) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; With
(l) intermediate-freuqncy signal has by the shared IF-FRE of these a plurality of frequency band.
9. the device described in claim 8, wherein said front end partly comprises a plurality of front end circuit, each front end circuit is adjustable in frequency band separately.
10. the device described in claim 8, wherein said front end partly comprises the front end circuit that a plurality of frequency band are shared.
11. the device described in claim 8 further comprises a plurality of antennas, each antenna transmission also is received in high-frequency signal in the frequency band separately.
12. the device described in claim 8 further comprises a community antenna, is used for sending and being received in the high-frequency signal of all frequency band.
13. the device described in claim 8, wherein these a plurality of frequency band comprise a 2.4GHz frequency band and a 5GHz frequency band.
14. radio communication device comprises:
(a) wireless communication section comprises:
(i) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(iii) baseband processor is used for receiving packet from described MAC controller, and the packet that receives is modulated into intermediate-freuqncy signal;
(iv) this baseband processor will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives;
(v) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is transformed into high-frequency signal;
(vi) this front end partly sends this high-frequency signal;
(vii) this front end partly receives the high-frequency signal from far-end, and converts the high-frequency signal that receives to intermediate-freuqncy signal;
(viii) this front end partly provides the intermediate-freuqncy signal that has transformed to described baseband processor;
(ix) described MAC controller partly provides suitable control signal for described front end;
(x) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller;
(xi) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; With
(xii) intermediate-freuqncy signal has by the shared IF-FRE of a plurality of frequency band;
(b) control section is used for selecting a frequency band and at the frequency channels of selected frequency band, avoids weakening the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
15. one kind is used for the device that communicates by radio, comprises:
(a) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(b) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(c) baseband processor can be used for receiving packet from described MAC controller according to different modulating/demodulating format operations, and the packet that receives is modulated into intermediate-freuqncy signal and will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives;
(d) front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is changed into high-frequency signal;
(e) this front end partly sends this high-frequency signal;
(f) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal;
(g) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor;
(h) described MAC controller partly provides suitable control signal for described baseband processor and described front end;
(i) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller;
(j) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection; And
(k) form selector is used for according to the control signal that provides from described MAC controller, and the signal of having selected one of described different modulating/demodulating form to provide to improve sends and receives.
16. device as claimed in claim 15, wherein frequency band comprises 2.4GHz frequency band and 5GHz frequency band, and the modulating/demodulating form comprises complementary code keying (CCK) and OFDM (OFDM).
17. as device as described in the claim 15, wherein intermediate-freuqncy signal has by a shared frequency of a plurality of frequency band.
18. Wireless Telecom Equipment comprises:
(a) wireless communication section comprises:
(i) MAC controller, the transmission data set that is used for being sent out is dressed up packet;
(ii) this MAC controller will resolve into the reception data from the packet of the intermediate-freuqncy signal of demodulation;
(iii) baseband processor, can be according to different modulating/demodulating format operations, be used for receiving packet, the packet that receives is modulated into intermediate-freuqncy signal and will be demodulated to packet from the intermediate-freuqncy signal of the high-frequency signal that receives from described MAC controller;
(iv) the front end part is used to receive the intermediate-freuqncy signal from described baseband processor, and the intermediate-freuqncy signal that receives is changed into high-frequency signal;
(v) this front end partly sends this high-frequency signal;
(vi) this front end partly receives from long-range high-frequency signal, and the high-frequency signal that receives is changed into intermediate-freuqncy signal;
(vii) this front end partly provides the intermediate-freuqncy signal of conversion to described baseband processor;
(viii) described MAC controller partly provides suitable control signal for described baseband processor and described front end;
(ix) described front end part can be transferred to the different frequency channels in each frequency channels, numerous frequency band that are used as a radio frequency a selected frequency band according to the control signal that provides from described MAC controller;
(x) frequency shift selector is used for according to the control signal that provides from described MAC controller, selects a frequency channels in a frequency band, sends and receive described data, with the interference on the frequency channels of avoiding appearing at initial selection;
(xi) form selector is used for according to the control signal that provides from described MAC controller, and the signal of having selected one of described different modulating/demodulating form to provide to improve sends and receives; And
(b) control section, the signal that has been used to select one of described different modulating/demodulating form to provide to improve sends and receives, and the modulation format control signal is offered the described MAC controller of described wireless communication section, this control section is selected a frequency band and the frequency channels in selected frequency band, avoid and to weaken the interference of communication, and will select control signal to offer the described MAC controller of described wireless communication section.
19. device as claimed in claim 18, wherein frequency band comprises 2.4GHz frequency band and 5GHz frequency band, and the modulating/demodulating form comprises complementary code keying (CCK) and OFDM (OFDM), when described form selector is selected the 2.4GHz frequency band, described form selector is selected the CCK form, when described form selector was selected the 5GHz frequency band, described form selector was selected the OFDM form.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000215790A JP4344904B2 (en) | 2000-07-17 | 2000-07-17 | Wireless communication equipment |
| JP215790/00 | 2000-07-17 | ||
| JP2000215788A JP4348498B2 (en) | 2000-07-17 | 2000-07-17 | Wireless communication equipment |
| JP215789/2000 | 2000-07-17 | ||
| JP215788/00 | 2000-07-17 | ||
| JP2000215789A JP4407017B2 (en) | 2000-07-17 | 2000-07-17 | Wireless communication equipment |
| JP215790/2000 | 2000-07-17 | ||
| JP215788/2000 | 2000-07-17 | ||
| JP215789/00 | 2000-07-17 |
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| Publication Number | Publication Date |
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| CN1334664A CN1334664A (en) | 2002-02-06 |
| CN100428706C true CN100428706C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011249056A Expired - Lifetime CN100428706C (en) | 2000-07-17 | 2001-07-17 | Radio communication apparatus |
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| US (1) | US6992990B2 (en) |
| EP (1) | EP1176709B1 (en) |
| KR (3) | KR100796083B1 (en) |
| CN (1) | CN100428706C (en) |
| CA (1) | CA2353143C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1176709B1 (en) | 2015-09-02 |
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| KR100890099B1 (en) | 2009-03-24 |
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